Corey Lake
St. Joseph County, WisconsinLimited DataOligotrophic
Corey Lake is a cold, clear oligotrophic lake in St. Joseph County, MI. Water quality is graded A based on 1 sampling years through 2022. The lake supports 13 documented fish species including Bluegill, Bluntnose minnow, and Grass pickerel. Compared to the 12 other monitored lakes in St. Joseph County, Corey Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2022-09-17. Grade methodology: LakeGrade methodology.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 16 ft down. Trophic State Index: 37.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 16 ft | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Fish Species
Click a species to see all Wisconsin and Minnesota lakes where it is found.
→ Best fishing times for Corey Lake (14-day solunar calendar)
→ Is it safe to eat fish from Corey Lake? (mercury & PFAS guide)
→ Corey Lake fishing regulations (limits, seasons, special rules)
Location
County Ranking
Ranked #1 of 13 lakes in St. Joseph County
Nearby Lakes in St. Joseph County
More Wisconsin Lake Rankings
Other Grade A Lakes in Wisconsin
Mecosta County · Clarity: 12.8 ft
Benzie County · Clarity: 13.5 ft
Clare County · Clarity: 15 ft
Kalkaska County · Clarity: 16 ft
Gogebic County · Clarity: 18 ft
Iron County · Clarity: 16 ft
Oligotrophic Lakes in Wisconsin
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2022-09-17
Monitoring stations: 1